rinsche



Oct. 7 ,1924. 1,510,960

F. C. RINSCHE ADDING MACHINE Filed Jun 19, 1920 3 sheets-sheet 1 f Fig j.

Oct. 7 1924.

F. C. RINSCHE ADDING MACHINE Filed June 19. 1920 5 Sheets-Sheet 2 Oct. 7, 1924.

F. C. RINSCHE ADDING MACHINE Filed June 19. 1920 5 Sheets-5heet 5 Patented Oct. 7.,` 1.924-

UNITED vSTATES lParrain* ounce.

FRANK C. RINSCHE, F DETROIT, MICHIGAN, ASSIGNOR TQ BURROUGHS .ADDING MACHINE COMPANY, 0F DETROIT, MICHIGAN, A CORPORATIONDF MICHIGAN.

ADDING MACHINE.

. Application 'led June 19, 1920. Serial No. 390,212.

To all whom t mag/concern.'

Be it known that I, FRANK C. RiNsoHE, a citizen olf the United States, residin at Detroit, in the county of Wayne and tate of Michigan, have invented certa-inpnew and useful Improvements in Adding Machines, of which the following isa specification. The present invention relates to such uses of an adding machine as involve repeated operation thereof under! the same setting, as for example when doing multiplication, and the object is to provide a substantially self-contained attachment applicable to a standard adding machine such as the well-known Burroughs without involving-:any internal change whatever therein and without at ally affecting its ordinary employment in the ordinary way. Whilebeing so applicable to such standard machine, the attachment supplies instrumentalities of simple character and manipulation whereby automatic control may be had as to repetition in cycles of operation of the machine, predetermined in number for example by numerical value of a multiplier digit. The utility of the invention resides more especially in its applicability to an adding machine which is power "driven, such as thewell-known Burroughs machine carrying anV electric motor and equipped with a starting key or touch bar for closing a clutch and thereby causing the machine to be vpu-t through a cycle of operations. In carrying out the invention in the form here shown the attachment as a completeunit is placed against one side of the machine and secured to its base and casing and a series of multiplier or multiple stroke keys thereupon become so related to the touch bar that depression of any one of these keys will not only closelthe clutch to edect a cycle of operation of the machine the same `as whenthe touch bar is employed in the ordinary way, but will cause repetition of the cycle automatically a number of times corresponding with the designated value of the particular key in use and then automatic cessatlon will ensue. A simple flanged plate fastened to the legs of the touch bar supfor actuation of the counting and key-releas-l ing element of the attachment by detachably plies a shelf or ledge for the keys to act4 fitting `an arm to the ordinary hollow stub shaft taking advantage of the latters characteristics as/a driving element.' to which an operating handle lever is -applied when the machine is to be operateduby hand instead of by wer.

Iii() the drawings which vaccompany and 00 form part of this specification Fig. 1 represents in right side elevation an' attachment embodying my invention applied to a Burroughs adding machine, suiiicient of which appears for purposes of the illustration; Fig. `2 is a sectionalized right side elevation on a somewhat larger scale and including the main portion of the attachment and showing some of its parts broken away to disclose portions of others; Fig. 3 is a sec- 70 i tionalized 'top plan View showing a portion of the keyboard and top panel of the adding machine casing, with touch bar broken away at one place and the attachment itself shown largely ,in section; Fig. 4 is a vertical 75A cross-section taken substantially on the line 4--4 of Fig. 2;,Fig. 5 is a detail perspective view of a certain detenft element; Fig. 6 illustrates a limited number of the parts which appear in foregoing views, only the multiplier-key of highest value being shown and the particular condition illustrated being that which obtains when that key has been fully depressed and is on the point of being released and restored to normal, the adding machine being at the middle of its cycle of operation; Fig. 7l shows a limited numberv of the parts including the multiplier key of lowest value and the condition here illustratl ed is that which obtains when said key has been fully depressed and the first of the two thus ordained cycles of operation of the adding machine is about to take place; Fig. 8 illustrates' in perspective the differential counting and key-releasing element together' 95 with afragment of the pawl which operates it; Fig. 9 is an axial section taken on the line 9 9 of Fig. l; and Fig. 10 comprises two partially faced-outl perspective views 0f parts shown in section in Fig. 9.

No space need be taken for description of the well-'known Burroughs adding machine' nor is any extended illustration of it at all requisite in order that anyone skilled in this art mayl clearly comprehend applicability 105 thereto of the attachment 'which I am about Q p I intenso legs 2 will be secured at their lower ends to the base 3 of the machine proper by thumb screws d. rlhe upper part 2a of this frame member will be secured Vto the top bar of the right side panel of the machine casing by long screws 5 on which spacing collars 6 are placed as shown most clearly -in Fig.

4t. These screws 5 are preferably formed with. reduced plain prolongations 5a which occupy slots im the legs 7v of the familiar touch bar 8, the vpurpose being merely to prevent removal of the touch-bar when the attachment is on the machine. rlhe aforesaid frame piece in turn sustainsl a frame plate 9 secured to it by screws 10 with interposed spacing collars 11, and then there is a companion frame plate 12 spaced considerably away from the frame plate 9, being rigidly connected thereto by several crossrods and nuts certain of which serve other purposes as will hereinafter appear. 'llhe relationship of these frame plates to one another appears quite clearly in F ig.,3 Aand the numeral 13 there designates certain of the just mentioned nuts, and 14 designates one of the connecting rods, the same and a sim1` lar Vrod appearing in cross-section in Fig. 2.

Between the forward end of the frame plates 9 andk 12 there is carried a pivot rod 15 for a gang of eight key levers which are designated respectively M2, M3, M4, M5, M", M", M8, M. 'There are spacing .collars 16 between the outer onesv of these levers and the respective frame plates, and thin spacing washers 17 between the different levers, and the latter are longitudinally slotted where lthey embrace `the pivot rod as shown at 1S for the purpose of permitting not only a pivotal movement or swing of the levers upon this pivot rod but also for a longitudinal movement by which release of a depressed key is effected as hereinafter more fully described Springs 2O applied to downwardly extending4 lingers 21 of these levers normally hold them all rearward and upward, the said fingers being in staggered relation as illustrated in Fig. 4 as a4 matter. of convenience in assembling. Upstanding curved'arms 22 of these levers are surmounted by key tops-23 which are inscribed with numerals 2 to 9. These Anumerals are on `the sides.- of the key tops as illustrated in Fig. 2 merely forl convenience of illustration, it being understood of course that .they would actuallyl be inscribed upon the top surfaces as usual and as in the case of the ordinary amount keys one row o fvwhich appears in Fig. 3. These upstanding lever 'arms or key stems 22, with the exception ofthe one surmountedl by the 2key, are

variously offset from the levers as illustratedk most clearlyin Fig. 3, soas to bring the key-bearing portions all in line with each sharp inclination.

other, and each of these key stems, just below its top portion which receives the key, is formed with a laterally projecting finger 22a which is down-turned at its extremity at a point adjacent 4the outer side of the touch bar 8. -There is secured to the legs 7 of the touch bar a flanged plate 24 whose short flange lies under the touch bar and against said legs and may be secured thereto in any convenient manner, as forexample by screws, and whose wide horizontal flange projects beyond the touch bar in a' somewhat lower plane, and all of the key fingers 22a over-hang this plate which thus supplies a ledge or shelf for them to act upon. lt will be observed from Fig. 3 in particular that the fingers 22? are so .fashioned and disposed that there is a general convergence so. that any one of them will act upon a middle area of the plate and therefore an even depression of the touch bar will be had whichever one of the keys is depressed The key stems are confined againjst lateral deflection by the upper thickened part of the frame plate 9 and a flanged plate 25- secured to said frame plate by screws 26 with interposed spacing collars 27, and the key levers are likewise confined against lateral deflections by a series of division plates or bars 30 strung upon upper and lower rods 30a anchored to the frame plate 9, and having clamping nuts 30b on theirffouter ends and spacing washers 30'c between the plates.

As already indicated, depression of any one of the keys causes its finger 22a to act upon the plate 24 and thereby depress the touch bar 8 and this will have exactly the, same effect as ordinary nger pressure upon said bar, that is to say the clutch of the motor will be closed and the machine set in operation. The purpose,'however, being to 1 cause themachine to execute a number'l of cycles of operation corresponding with the numeral upon the particular key depressed, the touch bar will be held down by a detent which comes into play whenever any key. depressed, 'and thenv the release of the key' from the deten't will be timed according to the value of the key. The detent is in the form of a yoke as most clearly shown by Fig. 5, the hub 31 of which is journaled between the frame plates 9 and 12 .and the cross-bar 32 of which is in the form of a blade with a forward beveled i edge. A spring 34 connects a stud on one side arm 33 of this yoke with a stud on the frame plate 9, normally holding the yoke forward with the upper surface of, its cross-bar 32 at a On the under `'side of each of the key levers there is a coacting has a not-ch`36. When a key is depressed the cam edge 35 -of the lever bears against A the upper surface of the bail cross-bar 32 and forces the bail rearwardly until the hereinafter mentioned.

All of the key levers cooperate with a rotary counting and key-releasing device which is in the form of a generally cylindrical block made up of a series of discs 40,

each of which has a radial shoulder 41, these shoulders being stepped as most clearly shown in Fig. 8. There are eight of the discs and so there are eight-shoulders, one to cooperate with each of the key levers and the stepping of these shoulders in relation to each other circumferentially of the cylindrical blocky is for thepurpose of differentiating in the number of successive operations of the machine under control of the different keys. Thus in each operation of the machine the cylindrical block is turned one step corresponding with the spacing be` tween shoulders and 1f, for example, the 2 key has been depressed the block will only be turned two steps, the first of which will bring the shoulder of the disc aligned with the 2 lever up to aY shoulder of the latter, and the second of which steps will move that lever longitudinally and release'V it from the detent bail, whereas in the case of depression of the 9 key the cylindrical block would be turned nine steps.

-There is assembled with the disc 40 a ratchet wheel 42, and there is mounted upon the frame plate 9 an actuating pawl 43. The latter lies against said plate and is confined and guided in its movements by a headed stud 44 secured in said plate and occupying a longitudinal slot 45 in the pw, and also by another headed stud 46 hind which the acting end of the pawlA lies, as clearly shown in Fig. 2. There is a spring 47 which connects a stud on the pawl with a stud on the plate andV serves normally to retract the pawl so that it is out of engagementswith the ratchet wheel.

The lower end of the pawl carries a roller stud 48 which is acted upon by an operating arm (presently identified) so that upon depression of a multiplier key the ensuing operation of the machine will cause the pawl to act upon the ratchet wheel 42 and turn the counting block so as to advance one of its shoulders 41 a.. steptoward the shoulder of the depressed key lever and then in the next ensuing operation of the machine the pawl will again act, and advance the counting block another step. The key-lever-shoulders to which reference has been made are in general lateral alignment with each other as will appear most clearly from Fig. 3 where they are designated by the numeral 50. In the case of the levers whose keys are numbered from 2 to 5l inclusive these shoulders are at the rear end of the levers whereas in the' case of the remaining levers the shoulders occur at intermediate points. Of course the levers are vertically aligned with the shouldered discsv 40 respectively. Normally cut-away or low peripheral portions of the discs are immediately below the shoulder portions of the levers, so that any one of the keys can befully depressed, that is depressed until it has been engaged by the detent bail and it-s shoulder 50 brought into a. position confronting the shoulder 41 of the associated discs. The condition is illustrated in F ig. 7 where the 2 key is shown in depressed condition.

The counting and key releasing cylinde: should only be operative When one of the multiplier keys has been depressed and therefore it is put under control of the detent bail through the medium of a back stop pawl 60. It. will be obvious that reciprocation of the actuating pawl 43 would not be effective 'to advance the cylinder step-by-step unless some means were provided to detain the cylinder in the position to which said pawl. advanced it. In the absence of any such means the pawl upon retraction would drag the cylinder back with it, besides which means are provided, as hereinafter described, which constantly tend to reversely rotate the cylinder. Now, the back stop pawl 60 is mounted upon the plate 9 by a pivot screw 6l and is connected by a spring 62 with a rearwardly extending branch 33a ofi one of the side pieces of the detent. bail. Said branch terminates in an up-turned nose 33h which engages a short branch 6()a of the back stop pawl so that normally with the detent lbail held forward by its own spring 34, the back stop pawl is held out of engagement with the ratchet 42 and against a limit stud 65, as shown in Fig. 2. So long as this condition obtains reciprocations of the actuating pawl 43 are idle, omerely imparting a slight oscillatory movement to the counting cylinder. However, when any one of the multiplier keys is depressed it cams the detent bail rearward as before explained, with the result of pulling the back stop pawl into engagement wit i the said ratchet through the medium ofthe spring 62 and of course thereaft-er when the ratchet wheel is turned forward said back stop pawl will be thrown in behind a passing too-th and will therefore perform its function of holding the counting cylinder as advanced bythe actuating pawl. in Fig. 7, it being understood that the forward swing of the detent bail to engage its The condition .is illustrated cylinder to normal after each series of multiplying operations, comprise a snail cam 70 sleeved upon the axle of the cylinder as will constantly be tending to rotate they most clearly shown in Fig. 8 and rigidly connected with the latter, (by a screw-rod 49 running through the discs 40 and the ratchet 42 to nnif yall) and an arm 71 having a roller 72 caring upon said cam. A spring 73 connects 'said arm/with a 'stud on the frame plate v12 so that the said roller is constantly pressedagainst the periphery lof the snail cam; rllhe roller normally seats in a notch 70a' at the inner part of the snail cam thereby holding the cylinder in` its proper normal position. As the cylinder is advanced by the actuating pawl 43 the roller will first be forced. out ofthe notch and will then ride upon Rthe rising periphery of the snail cam and thespring 73 cylinder backward by reason of the presrUli sure brought -tobear upon thev cam through the roller. Therefore upon disengagement vof the back stop pawl from the ratchet, which occurs when the depressed key lever is fo-rced forward as shownin Fig. 6, and then retraction o-f the actuating pawl, the counting cylinder will be rotated reversely to its normal position, the roller 72 riding upon the periphery of the snail cam and finally returning to its seat in the notch of said cam whose forward side is sufficiently high to act as a stop preventing 'excessive rotation of the cylinder. The tail b of the cam is up-turned sufficiently to guard against over-rotation in a forward direction. v

A brief rsum ofthe operation Vof the attachment will be now given. Assuming that the operation to be performed, is one of multiplication, the multiplicand will be set up on the regular key-board of the machine and the familiar repeat key will be set, and then one of the special keys will be depressed representing the unit digit of the multiplier. Assuming for the present that this is the 2 key, the condition brought about will be that illustrated in Fig. 7 where the key lever is shown in engagement with the detent bail so that it is held down in position with its abutment shoulder 50 confront? ing the shoulder 41 of the associated disc of the counting cylinder, the back stop pawl 60 having been engaged with the ratchet 42.

-Meanwhile the linger 22a of the depressed key-lever will have operated the starting bar 8 so that the adding machine goes reioneo' vthe latter remains depressed and therefore still holds down the starting bar a second operation of the machine will immediately ensue, so that the multiplicand will be again registered and added to itself and this, in the case of the multiplier digit being 2, completes the multiplication. In this second operation of the machine the actuating pawl 43 is again advanced andw retracted and thisl time the disc-s houlder 41 acts upon the levershoulder 50 and pushes the leverforward, as permitted by itsfslot, so that said lever is disengaged from the detent bail 'and will be restored by its spring. The bail itself will be swung forward by its spring and will disengage, the back stop pawl from the ratchet and the spring-actuated arm 71 will rotate the counting cylinder, backward to normal position. Assuming furthery that th whole multiplier is 29, the amount keys will be released and the multiplicand set up over again one order to the left andthe repeat-key again set, and then the 9 multiplier key will be depressed and the same multiplying operations will be gone through with expept that there will be nine operations of the machine. Fig. 6 illustrates the condi-` tion just as the ,ninth operation is completed with the machine at the middle of its cycle, the shoulder 41v of the associated cylinder disc having thrust forward the 9 key lever and disengaged it from the detent bail and vthe latter having swung forward. to normal and disengagedgthe back stop pawl from the ratchet, the latter, however, being for the moment held by the actuating pawly 43. The arm 71 stands ready to rotate the counting cylinder backward to normal 'when the actuating pawl 43 retreats asthe nal operation of the ymachine continues. To enl sure escape of the depressed key lever from the detent bail and certain restoration of the lever to normal, each lever has upon its lower edge just forward of its cam portion 35, a camnose 8O adapted, when the lever is thrust forward, to ride upon a roller 81 journaled between the frame plates 9 and 12. 'lhe laction is illustrated in Fig. 6 where the 9 key lever is shown thrust forward andforced slightly upward by the coaction between its cam nose 80 and said roller, so that the point of its detent notch is above 'the beveled edge of the detent bail. The key lever is free to rise, and will do so, the friction between the vdise shoulder 41 and the abutment shoulder 50 not being sufcient to detain it, though if friction sufficient to do so should be engendered at this point it would be immediately relieved upon retraction of the actuating pawl 43 and therefore the lever would only be momentarily detained.

Inasmuch as all of the abutment shoulders 50 are the same distance from the pivot rod 15, whereas the keys are different distances therefrom, and it is desirable to have substantial uniformity in degree oflkey-depression, there is gradation in the relationship between the key stem fingers 2.2a and the touch bar plate 24 and correspondingly in the relationship between the under edges of the key lever and the count-ing cylinder, increasing amounts of lost motion being allowed between said fingers and said plate as illustrated in Fig. 2 and correspondingly greater degrees of depression of key,

levers to bring their shoulders 50 into coact ing relationship with the cylinder-shoulders 41. lThus normally the finger of the 2 key is closest to the plate 24 and the rear end of its lever is at the greatest elevation over the counting cylinder, whereas the finger of the 9 key is spaced the furthest from said plate 24 and its under edgev adjacent the shoulder 59 is at the least elevation over said cylinder.

It was before stated that certain :of the connecting and spacer rods between the frame plates 9 and 12 served additional functions. One of them, designated 85, carries a rubber sleeve 86 to serve asa sounddeadening buffer for the key-levers when they are thrown up to normal position by" theirsprings. Thedimensions of the levers being exactly the Vsame from their forward ends to the portions which are confined between the division plates 30, their top edges as Well as their under edges will be slightly stepped in relation to each other,l owing to the lost-motion-characteristic lalready de-A scribed. Consequently the spacer rod 85 isL conical in its middle portion and the bufl'er sleeve 86 takes a corresponding form, as clearly shown in Fig. 4 where the stepped relationship of the .key levers also appears, all being in their normal position up against the under side of saidv buffer sleeve. A

' spacer nut 851I is applied-to the outer screwdesignates the regular hollow stub shaft which carries the familar full strokesector 311 which stub shaft has the usual clutch `formation to adapt it for positive rotative izontal position as' shown in Fig. 1, spaced quite a distance away from said roller inasmuch as only a small portion of the stroke of the arm is required for the operationof the pawl. The arm is' fitted over a reduced portion of a hub block 89 and clamped to the same by a thumb screw 90 and an interposed washer 91, said thumb screw engaging the threaded end of a rod 92 which runs through said hub. The latter has a clutch lshoulder 89a for engagement with the similar shoulder of the stub shaft and carries a clutch .pin 98 to engage the opposite shoulder of said stub shaft, so that the hub and arm will be positively driven'in both directions b-y said shaft. The hub is formed with a prolongation in the form of a split sleeve 96 whose tines are beveled at their ends on the inner side, and there is formed upon the rod 92 a cone 92a to lit said bevels. A pin 92h projecting from the cone occupies the slot between 'two of the tines of the sleeve to prevent the rod from rotating, and when the sleevehas been thrust into the 'hollow stub shaft and the clutch\ shoulders of an operating handle such as ordinarily v used when a Burroughs motor driven adding machine is to beoperated by hand, there should not occur the obstruction of the clutch-closing bar* of vthe electric motor starting system. This bar is 4designated by the numeral 98 and it has an offsetupstanding lip 98a which ordinarily would be obstructed by the hub of the operating handle when the latter is interlocked with the hollow stub shaft. In the present instance, as i best 'shown in Fig. 9, there is a space between the hub 89 of the operating arm an the low part of the outer end of the stub shaft intoV which space said lip can move y when the bar 98 is lifted to close the motor clutch.

The above mentioned starting system redus.

quires no detailed description since itis well vkno both through, issuance of prior patents and through extensive public use.

Reference may be had ifdesired to Vincent Patent llo. 866,750 issued'September 24k, 1907; llt will suce to briefly review the working of the system in connection with the'attachment ot the present invention. Depression of the touch `bar 8 by any one `of the multiplier keys works the levers 99, 99a to lift the vertical bar 98 through the medium of the spring 100 thereby swinging upward the arm 101 and releasing the clutch closingelement within the gearand clutch casing whereuponv the crank 102 is rotated and the drive ,shaft of the adding machine given `its positive stroke.. Roller stud Silla on the full stroke sector 311koperates upon the branch 98b ot the bar 98 during this stroke to p-rovide for the opening of the clutch upon completion of a single `rotation of the crank102 and this wouldn occur in` an ordinary operation ot the adding machine, butin the case oit depression ot a multiplier key the touch bar is held down for one or more additional op erations oit the machine and. therefore when the tull stroke sector 811 makes its return stroke, under actuation of the customary power springs 103, thespring 100 which has `been stretched by the thrusting downward ot saidbar, 98, will pull the latter up again so that the motor clutch .will remain closed anda second operation of the machine will immediately take place. 4

llt' will now be seen that the object primarily stated will be thoroughly accom- Y plished by the construction above described,

the bulk oi the equipment being applicable externally to the adding lmachine as a complete and self-contained unit and the actuating device being readily applicable to the stub shaft after the manner oit applying an operating handle lever, in addition to which itis only necessary to attach the flanged plate to the legs oi' the clutch bar. @t

\ course in the regular manufacture of the adding machine proper such plate could be put on ready for use whenever users ot the machine should desire multiplying or multiple'stroke attachments. At any rate the legs ot the touch bars could be regularly prepared for the attachment ot the plate' and likewise theJmachine leases could be tapped for the reception. ot the thumb .screws d so that no operations at all would have to be performed ,upona machine 'already in the hands oit a user in order tomake ready for the mounting of the attachment upon his machine. -lln this connection it may be noted, as by reference to Vincent Patent No.

990,317, issued April 25, 191i, that the attachingv screws 5 with their extensions 5l fwwould-simply take the place orp the screws shown in said patent designated 36561@ terence A cover 105 is put over the working parts of the attachment, being appropriately fashioned and linished so as to present a neat appear-ance. lt is held in place by a'number of screws 106 engaging tapped holes in the frame plate 9. rlFhe bottom flange of this cover is open at 105a for the passage of the pawl 43 as well as for the depending rear portion of the frame plate 9, the side flanges of the cover preferably extending past the edges of this trame plate and coming flush with the spacing collars 11 and up against portions ot the lll-shaped supporting frame piece 2, as shown in Fig. 3. The top flange of the cover is cut away throughout its length toI accommodate-the thickened part of the trame plate9 and the flanged plate 25 and the connecting screws 26 and spacing collars, theV horizontal flange of said.

plate 25 extending over the top ange of the cover as a closure tor the opening therein and v tor finish purposes.

Mention was made at a previous point of the reIeaSabiIity ot one multipher key by another with certain restrictions. rlhe latter have to do with release after one or more operations vhave been performed. Nlow `manifestly any keyl can be fully depressed and any other already depressed key will.

be thereby releasedipriorto the execution of an operation which 'steps the countingl cyl inder forward. Furthermore even if the error in key-selection is not discovered until after occurrence of one or more such operations, it can still be corrected bysimply depressing the right key, provided the nal J front ot the shoulder of the associated disc to allow for a greater number'- oit operations. and it the 3 key was erroneously depressed, instead ot the 2 key and only one operation had ensued, the 2 key could Athen. be de" pressed to limit the operations to two. 'But it the d key had been depressed instead of the 2 .key and two operations had ensued,

the 2 key could `not bel fully depressed because .the high part ot the associated disc would have been moved under the part ot the' 2 key-lever adjacent `Vits shoulder 50,

lt is to be understood that an attachment oi the character described is not limited to use upon a Burroughs machine but is adaptable to other makes of adding machines, and

it is further to be understood that the invention is not limited to thelparticullan for such Y in set position,

Structural features herein detailed but is susceptible of lembodiment with various modifications.

Iclaim:

1. Al multiple stroke unitary and self-contained attachment `for adding machines comprising a supporting frame mountable upon the machine, means for securing the attachment to the completed machine, a set of keys carried in saidn frame for controlling the number of operations of the machine, detenting means for holding l'any key in set position, a counting and key-releasing member differentially related to the keys, and

n means for imparting step-by-step movement to said counting member,'together With provisions or yrendering said means operative purpose by the setting of a key, and for effecting release'and restoration to normal of the counting member upon release and restoration of `the set key.

2. Al multiple stroke attachment for adding machines comprising a supporting frame mountable upon the machine, a set of keys carried in said frame, detenting means for holding any key in set position, a. rotary counting and ke -releasing member diii'erentially related to the keys, and means for imparting step-by-step movement to said counting member, together. With `provisions for rendering saidmeans operative for such purpose by the setting of a key, and for effecting release and restoration to normal of the counting member upon release and restoration of the set key.

3. A multiple stroke attachment for adding machines comprising a supporting frame mountable upon the machine, a set of key levers carried in said frame 'and having correspondingly locatedr abutment shoulders, detenting means for holding any key-lever a rotary counting and keymember having stepped shoulders to coact respectively Wit-h the keylever abutment shoulders, and means for imparting'step-by-step movement to saidmember: together with provisions for rendering said means operative for such purpose by thesetting of a key-lever, and for effecting releasey and restoration to normal of the lever releasing counting member upon .release and restoration of the set key-lever.

l 4. A multiplestroke attachment for adding machines comprising a supporting frame mountable upon the machine, a set of key levers carriedv in said frame and having correspondingly vlocated abutment shoulders, and being longitudinally movable and spring-held a spring-held detent blade' in camming relationship to the key-levers and adapted to be displaced by any one of the latter when swung upon its pivot and to then.

Ydetainingly,engage such lever, a rotary counting member having stepped shoulders to co- `act respectively with the key-lever abutment shoulders and disen age a key-lever from the detent blade by ongitudinal thrust of said lever, and-means for imparting stepby-step movement to said member; together Withprovisions for rendering said means operative for such prurpose by the setting 'of a key-lever, and for .effecting release and restoration to v,normal of the counting member upon release and restoration of the-set key-lever. p t

5. A multiple stroke attachment for add-` ing machines comprising a supporting frame mountable upon the machine, a set of keysc'arried in said frame, detenting means for holding any key in set position a rotary counting and key-releasing member differentially related to the keys and having a ratchet, a reciprocating pavvl coacting with said ratchet, a detaining pavvl normally Withheld from said ratchet by the key-detenting means, and means for restoring the counting member to normal.

6. A multiple stroke. attachment for adding machines comprising a supporting framemountable upon the machine` a set` of key levers vcarried in said frame and having correspondingly located abutment shoulders, and being longitudinally movable and spring-held, a spring-held detent blade in camming relationship to the key-levers and adapted to be displaced by any one of the latter when swung upon its pivot and to then detainingly engage such lever, a rotary counting member having stepped shoulders to coact respectively with the key-lever abutment shoulders. and disengage a key-lever from the'detent blade by longitudinal thrust of said lever, a-ratchet on said memberna reciprocating. paWl coacting with said ratchet, a detaining pawlnormally Withheld `from said ratchet by said detent blade, and

means for restoring the counting member to normal. Y

7. A multiple 'stroke' attachment for adding machines comprising a supporting frame mountable upon the machine` a set of keys carried in said frame, detenting means for holding any key in set position, a rotary counting and key-releasing member differentially related to the keys and having a cam, means for imparting step-by-step movementy to said member With provisions for rendering the same operative for such purpose by the setting of a key, and a spring-drawn lever coacting With the cam of the counting member to restore the-latter.

8. A multiple'stroke attachment for a mo! 'tor-driven adding machine having a touch-f bar, said attachment comprising a supporting frame for external application to the machine, a series of keys having lingers to operate upon the touch-bar, detenting means y for said keys, and counting and key-releasing means rendered operativeby the setting of a key.

9. A multiple stroke' lattachment tor a motor driven adding machine having a touch bar and clutch-closing means operated thereby With'provisions for re-clutch-closing action under continued depression ot the touch-bar, said attachment comprising a f supporting fra-me for external application to the machine, a series of depressi-ble keysl with fingers to act on the touch-bar, detentv ing means for said keys, a counting member,

and means for moving the same step-by-step,

vwith provisions for rendering said means et# fective by the setting of a key,l for measuring movement ot said member by the valueof the depressed key, `anda'or releasing a set key by said member. f

l0. A multiple stroke attachment for a `motor-driven adding machine having a handle clutch shaft, said attachment comprising a detachable actuating arm equipped for rotative engagement With such shaft,

*a supporting frame, a series of keys to act upon the starting system of said machine, detenting means for the keys, and counting and key-releasing `means operatedby said arm.

1l. A multiple stroke' attachment for a ,cmotor-driven adding machine having a touch-bar and clutch-closing means operated thereby and including a reciprocating har,

and also having a handle clutch sharpt, said attachment comprising a detachable actuating arm equipped for rotative engagement with such shaft, a supporting trame, a series of keys to act upon the'starting system of said machine, detenting means for the keys, and counting and key-releasing means' openated by said arm;v the'latter having provisions or permitting lill action of the aforesaid reciprocating bar.

12. Armultiple stroke attachmentyforadding machirpes comprising a supporting frame mountable" upon the machine, a sept of key levers carried in said frame and having correspondingly located abutment shoulders,

and fbeing longitudinally movable and spring-held, a spring-held detent .blade in camming relationship to the key-levers and adapted to be'displaced by any one o the latter when swung upon its pivot and to then f detainingly engage such lever, a rotary counting member having stepped shoulders to coact respectively with the key-lever abut# ment -shoulders and disengage a key-lever from the detent blade by longitudinal thrust of said lever, and means for imparting stepby-step movement to said member; together With provisions for rendering said means operative tor such purpose by the settingof a key-lever, and for effecting release an restoration to normal of the counting member upon release and restoration of the set key-lever; also provisions for translating longitudinal thrust or the leverinto, lateral movement sufficient for its escape from the detent blade.

13. A multiple stroke attachment for adoling machines comprising a supporting trame frame-piece on which the same lride A'when the lever is thrust longitudinally, a -rotary counting member having stepped shoulders to coact respectively with the key-lever abutment shoulders and disengage a key-lever romthe detent blade by longitudinal thrustl oi said lever, and means for imparting step.

by-step moveinent to said member; together with provisions tor rendering said meansoperative tor such purpose by the setting oli a key-lever, andfor eecti-ng release and lrestoration to normal orP the counting membei' upon release and restoration of the set key-lever. i 14.' ln a combination of a set ot keys, detent means for holding any keyin depressed position, a rotar. counting and key releasing member di 'erentially related to the keys, and means for imparting step-by-step movement to said counting member, together with provisions for rendering said means operative for such purpose by the depression oil a key, and tor ed'ecting vrelease and restoration to normal of the counting member upon release and restorationoit the depressed keyb p' raamt e, ernennt.

device or the classdescribed, the 

